#include <stdio.h>

struct student {
    int num;
    char name[20];
    char sex[5];
    int age;
    float score;
};

/*
num     name    sex     age     score
1       Yi      nan     10      88.10
2       Er      nv      12      77.90
3       San     nan     14      82.50
 */

int main() {
    struct student stu[3] = {
            {1, "Yi",  "nan", 10, 88.1f},
            {2, "Er",  "nv",  12, 77.9f},
            {3, "San", "nan", 14, 82.5f}
    };
    int i;
    printf("num\tname\tsex\tage\tscore\n");
    for (i = 0; i < 3; i++) {
        printf("%d\t%s\t%s\t%d\t%.2f\n",
               stu[i].num, stu[i].name, stu[i].sex, stu[i].age, stu[i].score);
    }
    return 0;
}